i believe traxxas does, and another site, they make the 3 speed for the t-maxx
freeway 105mph -kinda fun
backroad 110mph -REALLY fun
Sister driving - DOCTOR
Try RadRC . They make several parts for the MB and also have a 3-speed for the Maxx. I don't think RC Alloys makes the wheels anymore. According to Bill at RC Alloys, I was the only person to purchase a set, so he stopped making them.